package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RegexUtils;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.servlet.http.HttpSession;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.*;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Slf4j
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {
    @Resource
    private StringRedisTemplate stringRedisTemplate;
    /**
     * 发送手机验证码
     * @param phone  手机号
     * @return  code
     */
    @Override
    public Result sendCode(String phone, HttpSession session) {
        // 验证手机号
        if(RegexUtils.isPhoneInvalid(phone)){
            return Result.fail("手机号格式错误");
        }
        String code = RandomUtil.randomNumbers(6);

//        session.setAttribute("code", code);
        //保存验证码到redis
        stringRedisTemplate.opsForValue().set(LOGIN_CODE_KEY+phone, code, LOGIN_CODE_TTL, TimeUnit.MINUTES);

        log.info("发送验证码成功，验证码为：{}", code);
        return Result.ok("发送成功");
    }
    /**
     * 登录功能
     * @param loginForm 登录参数，包含手机号、验证码；或者手机号、密码
     */
    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        String phone = loginForm.getPhone();
        //1. 校验手机号
        if(RegexUtils.isPhoneInvalid(phone)){
            return Result.fail("手机号格式错误");
        }
        //2.校验验证码
        //todo 从redis中获取验证码
        Object code = stringRedisTemplate.opsForValue().get(LOGIN_CODE_KEY+phone);
//        Object code = session.getAttribute("code");
        String codeform = loginForm.getCode();
        //3.不一致报错
        if(codeform == null || !code.equals(codeform)){
            return Result.fail("验证码错误");
        }
        //4.一致 根据手机号查询用户
        User user = query().eq("phone", phone).one();
        //5.不存在则创建
        if (user == null){
            user = new User();
            user.setPhone(phone);
            user.setNickName("user_"+RandomUtil.randomString(6));
            save(user);
        }
        //6.保存用户到session并返回结果
        //todo 6.1.生成token
         String token = UUID.randomUUID().toString(true);
        //todo 6.2 user对象转为hashMap存储
        UserDTO userDTO =BeanUtil.copyProperties(user, UserDTO.class);
        Map<String,Object> map = BeanUtil.beanToMap(userDTO,new HashMap<>(),
                CopyOptions.create().setIgnoreNullValue(true).setFieldValueEditor((fieldName,fieldValue)->fieldValue.toString()));
        //todo 6.3 存储
        stringRedisTemplate.opsForHash().putAll(LOGIN_USER_KEY+token,map);
        stringRedisTemplate.expire(LOGIN_USER_KEY+token,LOGIN_USER_TTL,TimeUnit.MINUTES);
//        session.setAttribute("user",BeanUtil.copyProperties(user, UserDTO.class));
//        return Result.ok(BeanUtil.copyProperties(user, UserDTO.class));
        return Result.ok(token);
    }
}
